[3] In 1973, Wunderman, Ricotta & Kline was acquired by Young & Rubicam, at the time the world's largest ad agency.

In January 2015, Wunderman acquired a majority stake in Peruvian digital agency Phantasia.

[7] In January 2017, Wunderman purchased a majority stake in Brazilian agency Pmweb Comunicacao Ltda.

[9] In July, Wunderman and fellow WPP agency POSSIBLE were merged to form a digital marketing and advertising unit.

[15] Among the agency's early innovations are the Columbia Record Club, the 1-800 toll-free number for businesses (developed for a Toyota campaign, the United States Post Office campaign for Mr. ZIP[16] and the ZIP code, and the magazine subscription card.